Configuring Performance Alerts

Performance alerts can be generated when CPU, memory usage, network, storage throughput, or VM disk activity exceeds a specified threshold on a managed server, virtual machine, or storage repository. By default, the alert repeat interval is set to 60 minutes, and it can be modified if required.

Performance alerts will appear in the Alerts view (accessed by clicking on the Notifications button on the left hand pane). In addition, you can have performance alerts emailed to you along with other alerts: see XenCenter Alerts.

To configure performance alerts:

1. Select the server, virtual machine, or storage repository in the Resources pane, click on the General tab and then click Properties.
2. Click on the Alerts tab and then:
   • To request CPU performance alerts for a server or virtual machine, select the Generate CPU usage alerts check box, then set the CPU usage and time threshold that will trigger the alert.
   • To request network performance alerts for a server or virtual machine, select the Generate network usage alerts check box, then set the network usage and time threshold that will trigger the alert.
   • To request memory performance alerts for a server, select the Generate memory usage alerts check box, and then set the memory usage and time threshold that will trigger the alert.
   • To request disk usage performance alerts for a virtual machine, select the Generate disk usage alerts check box, then set the disk usage and time threshold that will trigger the alert.

   • To request storage throughput alerts for a storage repository, select the Generate storage throughput alerts check box, then set the storage throughput and time threshold that will trigger the alert.

     Note: This option generates alerts when the total read/write storage throughput activity on a Physical Block Device (PBD) exceeds the specified limit. PBD represents the interface between a specific XenServer host and an attached SR. When the total read/write SR throughput activity on a PBD exceeds the threshold you have specified, alerts will be generated on the host connected to the PBD. Unlike other host alerts, this must be configured on the relevant SR.

   • To change the alert repeat interval, enter the number of minutes in the Alert repeat interval box. Once an alert threshold has been reached and an alert generated, another alert will not be generated until after the alert repeat interval has elapsed.
3. Click OK to save your changes.